diff --git a/twostep-container-build/examples/Containerfile b/twostep-container-build/examples/Containerfile
index 59e6117..65bc27c 100644
--- a/twostep-container-build/examples/Containerfile
+++ b/twostep-container-build/examples/Containerfile
@@ -3,6 +3,6 @@ ARG GH_SHA=undefined
 
 FROM ghcr.io/cdcgov/cfa-actions:${TAG}
 
-LABEL GH_SHA=${GH_SHA}
+LABEL GH_SHA="${GH_SHA}"
 COPY twostep-container-build/examples/Containerfile /app/.
 CMD ["bash"]
\ No newline at end of file